You're playing with fire here, literally.

Be VERY SURE of what you are doing.

They [LiPos] are safe when charged/discharged PROPERLY but... these batteries are very volitile and can burn in excess of 2000F.

LiPos use a CC/CV (constant voltage/constant current) algorithm and ARE NOT compatible with other charging schemes (such as timed, etc.).

I'm NOT an expert, maybe the others here are, but anyone can find this info on the web. Not to mention the disclaimers supplied with the batteries and chargers/balancers.

Do your own research and make your own call or seek out someone locally who can BE SURE of what you are doing.

There are stories of LiPO fires on RC forums!